AKUREYRI, Iceland—American skateboarder and social media influencer Josh Neuman was one of four men killed when a sightseeing plane crashed into a lake in Iceland, authorities in the North Atlantic island nation said Monday. Neuman, 22, was on the flight to create commercial content for the Belgian fashion brand Suspicious Antwerp along with Tim Alings, the company’s sponsorship manager, 27; and Nicola Bellavia, a 32-year-old skydiver and social media influencer from Belgium. The pilot, Haraldur Diego, 49, was considered one of Iceland’s most prominent aviators and a pioneer of photography tours. Four bodies believed to be the men were discovered on Sunday in Lake Thingvallavatn, Iceland’s second-largest lake with the use of an autonomous submarine and sonar technology. Poor weather has prevented divers from retrieving the bodies, found at depths of up to 157 feet (48 meters). “For the safety of divers we have to wait until the weather improves,” …